If they are 1st party games or games that are FUNDED and published by a console maker, then no as it promotes healthy competition.
If the dev chooses only one platform, it sucks but they have their reasons. Maybe they do not have the resources to do more than one effectively, especially if say a JRPG, as an example, does not sell enough on X1 to make a profit. It sucks, but can't really hold it against them.
If a game is money hatted into not releasing on a certain platform, but the party involved is not funding and publishing the game themselves, then and only then can it truly be considered BAD for the industry...and make no mistake this particular practice is horrible.
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